JPH079329B2 - Non-condensing gas discharge device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a non-condensable gas discharge device provided with an oil exchange device for an exhaust pump.

(B) Conventional technology In machines such as absorption chillers, absorption heat pumps, absorption chiller-heaters or boilers that boil water under low pressure, the non-condensable gas that accumulates inside the machine is discharged outside the machine by an exhaust pump. Maintaining good performance is generally
Has been done. It is also generally known that the exhaust pump extracts the steam (e.g., steam) of the working fluid of the machine together with the non-condensable gas in the machine, and therefore the oil used for the exhaust pump gradually deteriorates depending on the operating time of the exhaust pump. There is.

For this reason, conventionally, the exhaust pump is maintained by periodically changing the oil, for example, every month. [(Incorporated Association) "Gas absorption chiller / heater / absorption chiller" issued by the Japan Refrigeration and Air Conditioning Industry Association. Correct driving method "(1982, 2)
Page 53 to page 58 of the first revision of the month).

(C) Problems to be solved by the invention In the conventional maintenance method described above, the oil is regularly changed regardless of whether the exhaust pump is used frequently or not, so this is not always done at an appropriate time. There was a problem that not. That is, in the former case, the oil change time is too late, while in the latter case, the oil change time is too early to replace the oil that can still be used sufficiently.

For this reason, there is also a method of manually selecting the frequency of use and operating time of the exhaust pump to individually select an appropriate oil change time and changing the oil, but this method requires too much time for the operation manager. Have a point. Also, in a non-condensable gas discharge device that automatically operates the exhaust pump by sensing the pressure inside the machine or the non-condensable gas storage tank with a sensor, manually recording the number of times the exhaust pump is started and stopped and the operating time, In fact, it has a problem that it is almost impossible.

In view of such a problem, the present invention integrates the operating time of the exhaust pump instead of manually, and automatically replaces the pump oil when the integrated operating time reaches the operating time at which the exhaust pump oil needs to be replaced. The purpose of the present invention is to provide a non-condensable gas discharge device that can be performed in a specific manner.

(D) Means for Solving the Problems As a means for solving the above problems, the present invention provides a device for discharging non-condensable gas in a system such as an absorption refrigeration system to the outside of the system by an exhaust pump. An oil exchange device for the pump, an operation time accumulation device for the pump, and a control device for activating the oil exchange device when the integration time of the operation device reaches a set value.

(E) Operation In the non-condensable gas discharge device of the present invention, the totalizing device calculates the operating time from the start of the operation of the exhaust pump to the end of the operation, and adds the operating time for each operation of the pump to obtain the total operating time. The control device activates the oil changer when the accumulated total operating time reaches the set value [the time set as the required operating time for oil exchange of the pump]. do. As a result, the oil exchange of the exhaust pump is automatically performed at an appropriate time, and excessive deterioration of the oil in the pump can be prevented. Further, it is possible to prevent the exhaust capacity of the pump, that is, the noncondensable gas discharge capacity of the apparatus from being deteriorated due to the excessive deterioration of the oil, and the accompanying deterioration of the performance of the machine such as the absorption refrigerator.

(F) Embodiment FIG. 1 is a schematic system configuration explanatory view of an embodiment of the non-condensable gas discharge device according to the present invention. In FIG.
(Ab) is an absorption refrigerator (absorption heat pump), which connects equipment such as a generator (G), a condenser (Cd), an evaporator (E), and an absorber (A) with piping [not shown]. Is configured. (P _G ) is an exhaust pump, which is connected to the absorber (A) of the absorption chiller (Ab) or other components by a solenoid valve (SV ₀ ), a pipe (P ₁ ) with an electric valve (V). It is connected. In addition, (P _G ) shown by a two-dot chain line is a container for storing the non-condensable gas, and the exhaust pump (P _G ) for the non-condensable gas and the absorption refrigerator (Ab) are connected through this container. good. Further, an exhaust port (E _X) is an exhaust pump (P _G).

(ES) is a power switch, switch (E to exhaust pump by turning on and off of the switch (P _G) is started and stopped
S) and the pump (P _G) and are connected by electrical wiring. Although not shown, a power switch (ES) and the solenoid valve (SV ₀₎ and the motor-operated valve (V) are connected by electric wiring via a control device to be described later, the exhaust pump (P _G) After the operation, the electric valve (V) is opened first, and then the solenoid valve (SV ₀ ) is opened. On the other hand, so that the operation of the solenoid valve (SV ₀₎ is first closed and then the electric valve exhaust pump after (V) is closed (P _G) is stopped.

(C _AL) is an integrated device which is connected by electrical wiring to the power supply switch (ES), the operating time of the device switch time i.e. exhaust pump to be turned off from on in (ES) (P _G) calculated, and the switch integrates the operating time of the total for each start-stop on and off every said Kaere if exhaust pump (ES) (P _G), which is recorded as operating time of the pump (P _G) It is a thing. (C) is a control device having a built-in time setting device (TS), and this control device is electrically connected to an integrating device (C _AL ). Further, (OS) is an oil supply device to the exhaust pump (P _G ), which is connected to the control device (C) by electric wiring and also through the pipe (P ₂ ) to the exhaust pump (P _G). ). Note that (CL) is an alarm that is electrically connected to the control device (C).

(P ₃₎ in the oil discharge pipe of the exhaust pump (P _G), in the oil discharge pipe has a solenoid valve (SV ₁₎ is equipped, and the electromagnetic valve is connected by electrical wiring to the oil supply device (OS) have the oil supply from the device the to the exhaust pump (P _G) is adapted to be opened when the made. Further, (T _WO ) is a waste oil tank.

The aforementioned time setter (TS) is set operating time of the exhaust pump (P _G) that require oil changes, accumulation and total operating time and were of the setting time and the multiplication unit (C _AL) is equal When the control device (C) is turned on, the control device (C) issues an operation signal for the oil supply device (OS) and the alarm device (CL). Although not shown, the electronic circuit of the control device (C) is provided with a program timer, a comparator for determining the size of the set time and the integration time, a timer, and a reset switch for the integration device (C _AL ). ing.

FIG. 2 is a schematic configuration diagram showing a specific example of the oil exchanging device used in the non-condensable gas discharging device of the present invention, and the same components as those shown in FIG. 1 are designated by the same reference numerals. ing. In Fig. 2, (T _NO ) is an oil tank, and (T _SO )
Is a tank for stocking the required amount of oil for replacement, and (SV ₂ ) and (SV ₃ ) are solenoid valves, and these devices are
An oil supply device (OS) is configured by connecting (P ₄ ), (P ₅ ), and (P ₆ ). Incidentally, (R _S ) is a relay switch for starting and stopping the oil changer, and this switch is built in the control device (C).

FIG. 3 is a diagram showing an example of a tatim chart of valve control of the oil changer shown in FIG. Therefore, the third
The operation of the oil changer shown in FIG. 2 will be described with reference to the drawings.

Integrated operating time set time of the exhaust pump (P _G) [example 20
Time], the controller (C) operates the oil changer according to the time chart (see FIG. 2) set in the program timer. That is,
The start / stop switch (R _S ) of the oil changer is turned on,
First solenoid valve (SV ₁₎ is degraded oil in the exhaust pump is opened for a predetermined time period (P _G) is discharged. Then, when the solenoid valve (SV ₁ ) is closed, the solenoid valve (SV ₃ ) is held for a predetermined time.
Is opened and a desired amount of oil is stocked in the oil tank (T _NO ) while flowing down to the tank (T _SO ).
Then, when the solenoid valve (SV ₃ ) is closed,
The new oil flows down opened solenoid valve (SV ₂₎ from the tank (T _SO) to an exhaust pump (P _G). In addition, the solenoid valve (SV
₂ ) When a predetermined time for opening the valve has elapsed, the valve is closed and at the same time the reset switch of the control device (C) is activated, which resets the oil changer start / stop switch (R _S ) and turns off the control device. The program timer in (C) is also reset. That is, the oil change exhaust pump (P _G) in the above-described procedure is done automatically. Then, again, when the integrated operating time of the exhaust pump (P _G) reaches the set time, it is the above-described operation is repeated.

FIG. 4 is a block diagram showing another embodiment of the main part of the device of the present invention. In this figure, the same parts as those shown in FIGS. 1 and 2 are designated by the same reference numerals. . In FIG. 4, (DR) is an operation relay of the exhaust pump (P _G ), which is a power switch (ES), a motor of the exhaust pump (P _G ), and a control device (C) with a built-in device (C _AL ). so as to control the start-stop of the exhaust pump (P _G) be electrically connected to the. Although not shown, a pressure sensor provided inside the absorption refrigerator (Ab) or in the noncondensable gas storage container ( _TG ) is connected to the relay (DR), and an exhaust pump is connected via this relay. It is also possible to control the start / stop of (P _G ) and the opening / closing of the solenoid valve (SV ₀ ) and the electric valve (V).

The integrating device (C _AL ) of the control device (C) is the relay (D
By receiving on-off signals of R), integrating the operating time of the exhaust pump (P _G). Although not particularly shown, the control device (C) is formed with an electronic circuit or an electric circuit having a time setting unit, a program timer, and a reset unit thereof, as in the case shown in FIG. Of course. In addition, this circuit is a RAM, ROM, CPU
It may be configured by computer parts such as.

(PS) is a relay type contact built in the control device (C), and when this contact is closed, the alarm device (CL) and the oil exchange device are activated. Also, the control device (C)
When the reset part of is activated and the contact (PS) is opened,
The operation of the alarm (CL) and the oil changer is stopped. The operation of the oil changer is performed in the same procedure as the time chart shown in FIG.

(G) Effects of the Invention As described above, the present invention is a non-condensable gas discharge device, a device for automatically integrating the operating time of the exhaust pump used for the device, and an exhaust pump when the integrated time reaches a set time. And a device for activating the automatic oil changer described above, it is possible to easily and automatically change the oil in the exhaust pump at an appropriate time without the need for manpower. Therefore, the non-condensable gas discharging device of the present invention can easily prevent performance deterioration of a machine such as an absorption refrigerating machine due to a decrease in non-condensable gas discharging ability due to deterioration of oil in the exhaust pump, and has practical value. It is expensive.

[Brief description of drawings]

FIG. 1 is a schematic diagram of the system configuration of an embodiment of the non-condensable gas discharge device according to the present invention, FIG. 2 is a schematic configuration diagram showing a specific example of the oil exchanging device used in the device of the present invention, and FIG. FIG. 4 is a diagram showing an example of a time chart of valve control of the oil exchange device shown in FIG. 2, and FIG. 4 is a block diagram showing a main part configuration of another embodiment of the device of the present invention. (Ab) …… Absorption refrigerator, (P _G ) …… Exhaust pump,
(C _AL ) …… Integrator, (OS) …… Oil supply device,
(C) …… Control device, (TS) …… Time setter, (SV ₁ )
...... Solenoid valve, (P ₁ ), (P ₂ ), (P ₃ ) ... tube.

Claims (1)

[Claims] 1. A non-condensable gas discharge device for discharging non-condensed gas inside a device or inside a device by an exhaust pump, comprising an oil exchange device for the exhaust pump and a device for accumulating the operating time of the exhaust pump, A non-condensable gas discharge device comprising a control device for activating an oil exchange device when the integration time of the integration device reaches a set value.